# 逻辑运算符 与 或 非
# and or not

a = 10
b = 20
c = 30

# # 短路运算 and
# if a > b and 3 / 0:
# # if 3 / 0 and a > b:
#     print("成立")
# else:
#     print("不成立")


# 短路运算 or
if a < b or 3 / 0:
# if 3 / 0 or a < b:
    print("成立")
else:
    print("不成立")




# if a < b or b == c:
#     print("成立")
# else:
#     print("不成立")


# not 取反
# if not a < b:
#     print("成立")
# else:
#     print("不成立")